Whiteside County, Illinois Zip Codes by Population (2024)

The most populated Zip Code in Whiteside County, Illinois is 61081, located in Sterling. * 2024 populations estimated based on the latest ACS 5-year data.

Zip Code
City
Population
61081Sterling21,138
61071Rock Falls13,766
61270Morrison7,096
61252Fulton5,424
61277Prophetstown2,978
61250Erie2,713
61283Tampico1,422
61230Albany932
61261Lyndon644
61251Fenton382
61243Deer Grove277
61037Galt105